Only the Brits could
Only the Brits could have done better. In fact, that's the only thing anyone has to worry about here.
Only the Brits could have been proud to have taken on this. But the Brits were, in fact, doing the opposite. They were going to have to take on the Germans, and instead of just making a movie out of the British, they decided to make a movie that would make them feel sorry for themselves. They made the British feel sorry for themselves. And that's the only reason they got it.